checkpatch: correctly stop scanning at the bottom of a hunk
[linux-2.6.git] / scripts / checkincludes.pl
1 #!/usr/bin/perl
2 #
3 # checkincludes: find/remove files included more than once
4 #
5 # Copyright abandoned, 2000, Niels Kristian Bech Jensen <nkbj@image.dk>.
6 # Copyright 2009 Luis R. Rodriguez <mcgrof@gmail.com>
7 #
8 # This script checks for duplicate includes. It also has support
9 # to remove them in place. Note that this will not take into
10 # consideration macros so you should run this only if you know
11 # you do have real dups and do not have them under #ifdef's. You
12 # could also just review the results.
13
14 sub usage {
15         print "Usage: checkincludes.pl [-r]\n";
16         print "By default we just warn of duplicates\n";
17         print "To remove duplicated includes in place use -r\n";
18         exit 1;
19 }
20
21 my $remove = 0;
22
23 if ($#ARGV < 0) {
24         usage();
25 }
26
27 if ($#ARGV >= 1) {
28         if ($ARGV[0] =~ /^-/) {
29                 if ($ARGV[0] eq "-r") {
30                         $remove = 1;
31                         shift;
32                 } else {
33                         usage();
34                 }
35         }
36 }
37
38 foreach $file (@ARGV) {
39         open(FILE, $file) or die "Cannot open $file: $!.\n";
40
41         my %includedfiles = ();
42         my @file_lines = ();
43
44         while (<FILE>) {
45                 if (m/^\s*#\s*include\s*[<"](\S*)[>"]/o) {
46                         ++$includedfiles{$1};
47                 }
48                 push(@file_lines, $_);
49         }
50
51         close(FILE);
52
53         if (!$remove) {
54                 foreach $filename (keys %includedfiles) {
55                         if ($includedfiles{$filename} > 1) {
56                                 print "$file: $filename is included more than once.\n";
57                         }
58                 }
59                 next;
60         }
61
62         open(FILE,">$file") || die("Cannot write to $file: $!");
63
64         my $dups = 0;
65         foreach (@file_lines) {
66                 if (m/^\s*#\s*include\s*[<"](\S*)[>"]/o) {
67                         foreach $filename (keys %includedfiles) {
68                                 if ($1 eq $filename) {
69                                         if ($includedfiles{$filename} > 1) {
70                                                 $includedfiles{$filename}--;
71                                                 $dups++;
72                                         } else {
73                                                 print FILE $_;
74                                         }
75                                 }
76                         }
77                 } else {
78                         print FILE $_;
79                 }
80         }
81         if ($dups > 0) {
82                 print "$file: removed $dups duplicate includes\n";
83         }
84         close(FILE);
85 }